The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 20, 2019
Filed:
Dec. 20, 2016
GM Global Technology Operations Llc, Detroit, MI (US);
Raffaele Esposito, Siano, IT;
Alberto Giordano, Robilante, IT;
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
An internal combustion engine fluidly coupled to an exhaust aftertreatment system that includes an exhaust purifying device is described. A pressure monitoring device is disposed to monitor a pressure differential between an inlet and an outlet of the exhaust purifying device. A method of monitoring the exhaust purifying device includes monitoring a pressure differential between an inlet and an outlet thereof, and determining an exhaust gas flowrate associated with operation of the internal combustion engine. A raw flow resistance is dynamically determined based upon the pressure differential and the exhaust gas flowrate, and an estimated flow resistance is determined based upon the raw flow resistance. The exhaust purifying device is evaluated based upon the estimated flow resistance.